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Related Concept Videos

Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh.
Masonry Curtain Walls01:20

Masonry Curtain Walls

Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer units.
Insulation Coordination01:23

Insulation Coordination

Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times for...
Masonry Cavity Walls01:26

Masonry Cavity Walls

Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
Maintaining a clean cavity during construction is...
Composite Masonry Walls01:18

Composite Masonry Walls

Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
Cavity Drainage and Flashings in Masonry walls01:20

Cavity Drainage and Flashings in Masonry walls

Typically, a cavity wall consists of two wythes separated by a gap of at least 2 inches, which may contain insulation while still maintaining a minimum clear space of 1 inch to facilitate adequate drainage. Advanced methods like the insertion of a continuous drainage mat can further reduce this space while ensuring effective moisture expulsion.
Weep holes, strategically placed at the base of the cavity, are critical for draining accumulated water. These openings are created by leaving head...

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Related Experiment Video

Updated: May 20, 2026

Preparation of Thermoresponsive Nanostructured Surfaces for Tissue Engineering
12:22

Preparation of Thermoresponsive Nanostructured Surfaces for Tissue Engineering

Published on: March 1, 2016

Self-Adaptive Non-Flammable Wallpaper With Layered Bead-Network Structure for Light Path Modulation Enabling

Jianyu Wu1,2, Linmin Xia3, Jiankun Wu1,2

  • 1College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 19, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel wallpaper that self-adapts for radiative cooling and solar heating. It achieves high performance by regulating light paths, enhancing building energy efficiency.

Keywords:
building thermal managementhydroxyapatite nanowireradiative coolingsolar heatingthermochromism

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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Area of Science:

  • Materials Science
  • Nanotechnology
  • Energy

Background:

  • Self-adaptive materials for radiative cooling and solar heating are of great interest for energy efficiency.
  • Current limitations include poor solar reflectivity and spectral conversion due to color residue and weak scattering in adaptive components.

Purpose of the Study:

  • To develop a self-adaptive material with improved radiative cooling and solar heating capabilities.
  • To overcome the limitations of existing thermochromic materials by enhancing spectral conversion and reducing color residue.

Main Methods:

  • A layer-by-layer embedding strategy was employed, incorporating thermochromic microcapsules into a hydroxyapatite nanowire bundle network.
  • This created a multi-layered bead-network structure for light path regulation, enabling selective reflection or absorption.

Main Results:

  • The developed wallpaper achieved 94.1% reflectivity and 95.5% emissivity in cooling mode.
  • It demonstrated a solar spectral regulation capability of 30.4%, with a maximum cooling effect of 5°C and a heating effect of 8.5°C.
  • The material also exhibited excellent flame-retardant and self-cleaning properties.

Conclusions:

  • The proposed layer-by-layer strategy effectively integrates contradictory optical properties, overcoming color residue limitations.
  • This novel wallpaper offers a promising solution for enhancing building energy efficiency through self-adaptive radiative cooling and solar heating.
  • The material's additional flame-retardant and self-cleaning features enhance its practical applicability.